Vehicle-spring.



J. A. JACKSON an s.. GQ 1 f \.ULso1\'r. VEHICLE SPRING.

AEPLIOATION FILED DGT.122,1904.

,wb'ewea @WW 00% PATENTED AUG. 1, 1905 @110.796,216. n PATENTBD AUG. 1,1905.

J. A. JACKSON & S. U. PAULSON.

VEHICLE SPRING.

APPLICATION FILED 1001'. 22,1904.

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J AOOB A. JACKSON, OF MINNEAPOLIS, AND SOREN C. PAULSON, OF BREOK-ENRIDGE, MINNESOTA.

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Specification of Letters Patent.

Patented Aug. 1, 1e( 5.

Application filed October 22, 1904. Serial No. 229,531.

To all whom t may concern.' y

Be it known that we, J AOOB A. J AcKsON, re-

siding at Minneapolis, in the county of Henne-y pin, and SOREN C.PAULSON, residing at Breckenridge,.in.the1county of Wilkin, State ofMinnesota, citizens of the United States, have invented certain new anduseful Improvements in Vehicle-Springs; `and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

Our invention has for'its object to provide an improved vehicle-springwhich will hold the body of the vehicle level or always parallel to itsoriginal position regardless of the point of application of the load onsaid body.

To the above ends the invention consists of the novel devices andcombinations ofde? vices hereinafter described, and defined in theclaims.

In Athe accompanying drawings the improved spring is illustrated asapplied to support the body of the carriage or wagon from therunning-gear; but it will of course be understood that springs of thischaracter may be employed for many other purposes-such,

for instance, as for supporting car-bodies from the car-trucks.

In the drawingslike characters indicate like parts throughout theseveralviews.

Figure 1 is a view in vertical section, showing the rear portion of aroad-vehicle and illustrating one of the improved springs appliedthereto. Fig. 2 is a rear elevation of the parts shown in Fig. 1, someparts being sectioned and some being removed. Fig. 3 is a plan view ofthe spring removed from working position, and Fig..4 is a plan viewshowing in detail the yoke-like base member of the compound spring.

The numeral 1 indicates the rear` axle, the numeral 2 one of the rearwheels, and the numeral 3 the body or box of a vehicle. The completespring is made up of a plurality of levers and one or more spring-coilsor yield- 4 ing elements and, as illustrated in the draw-` ings,comprises a pair of'crossedlevers 4, that are pivotally connected at 5.These levers at their lower ends are suspended by links 6 from theupturned horns or prongs -7 of a channel-like body 8, which is rigidlysecured to the axle 1, as shown, by U-bolts 9, clamping-plates 10, andnuts 11. This body the body 3 of the vehicle.

the tension of the spring and the normal positions of the levers 4 maybe varied. The upper ends of the levers 4 are pivotally conne'cted tothe free'upper ends of crank-arms `17,'the rods 18 of which are looselyjournaled in bearings 19 on the vehicle-body 3.

Asis evident, the tension-coil 14 tends to draw the lever-arms 12 towardeach other, and thereby raise the lever-pivot 5, and hence It is alsoevident that the load on the vehicle-body will v overcome thetension-coil 14, more or less, and will thereby lower the vehicle-bodyand the said lever-pivot. Since the vehicle-body cannot move downwardwithout imparting like movements to both levers 4, it is evident thatthe said body will always be'maintained in its horizontal position orparallel with the axle 1 and that this relation of the parts must bemaintained even when all the weight of the load is applied at one sideof the vehicle-body. Where an extremely stiff spring is required,compression-coils 2O may be interposed between the levers 4, and, ifdesired, a compression-coil 21 may be interposed between the base member8 and the intermediate portions of the two levers. These coils 2O and 21are indicated by dotted lines in Fig. 2.

From what has been said it will be understood that the device describedis` capable of modification within the scope of our invention as hereinset forth and claimed.

What we claim, and desire to secure by lietters Patent of the UnitedStates, is as follows:

1. The combinationwith a base-support, of a pair of levers pivot-allysupported therefrom at their lower ends, and provided with dependingarms, said levers being crossed and pivotallyconnected at theirintermediate portions, a spring-coil connecting the depending arms ofsaid levers, and a body supported from the upper ends of said levers,substantially as described.

2. The combination with the base member 8, having upturned portions 7,of a pair of crossed levers 4, pivotally connected at 5, and having thedepending arms l2, links 6 connecting the lower ends of said levers tosaid portions 7, a

'spring-coil 14 adjustably connected to said arms 12, the cranks 17pivotally connected to the upper ends of said levers 41., and a bodyhung on said cranks,substantialb7 as described.

8. The combination With a pair of levers A. crossed at theirAintermediate portions, and pivotally connected at 5, said levers havingdepending arms l2, of a spring-coil connecting said arms 12, andspring-coils interposed between said levers,substanti ally as described.In testimoniT whereof` we aiiix our signatures each in the presence oftwo witnesses.

JACOB A. JACKSON. SOREN C. PAULSON.

Witnesses as to the signature of Jacob A. Jackson:

ROBERT C. MABEY, F. D. MERCHANT. Witnesses as to the signature of SorenC Paulson:

WM. F. Eeiins, T. E. KNUDsoN.

